运算符重载

代码

#include <iostream>
using namespace std;
class Num
{
private:int num1; //实部int num2; //虚部
public:Num(){}; //无参构造Num(int n1,int n2):num1(n1),num2(n2){}; //有参构造~Num(){}; //析构函数const Num operator+(const Num &other)const  //加号重载{Num a; //定义临时类对象a.num1 = num1 + other.num1; //实部相加a.num2 = num2 + other.num2; //虚部相加return  a;}bool operator==(const Num &other)const //相等重载{//判断实部虚部是否分别相等if(num1 == other.num1 && num2 == other.num2){return true;}else{return false;}}Num &operator+=(const Num &other)  //加等重载{//实部虚部分别加等于num1 += other.num1;num2 += other.num2;return *this;}Num &operator++()  //重载前置++{++num1;++num2;return *this;}Num &operator++(int) //重载后置++{num1++;num2++;return *this;}Num operator-()const  //重载-{Num temp;temp.num1 = -num1;temp.num2 = -num2;return temp;}void init(int n1,int n2)  //修改类中的值{num1 = n1;num2 = n2;}void show() //展示{if(num2 < 0){cout << num1 << num2 << "j" << endl;}else{cout << num1 << "+" << num2 << "j" << endl;}}
};
int main()
{Num test0;      //调用无参构造Num test1(2,3); //调用有参构造test0.show();   //调用展示函数cout << "*********************" << endl;test0.init(3,2);    //调用修改函数test0.show();cout << "*********************" << endl;test0++;test0.show();cout << "*********************" << endl;++test0;test0.show();cout << "*********************" << endl;if(test0 == test1)  // 调用重载的相等函数{cout << "true" << endl;}else{cout << "false" << endl;}cout << "*********************" << endl;test0 += test1; //调用加等于重载函数test0.show();test1 = -test0; //调用重载-cout << "*********************" << endl;test1.show();return 0;
}

运行结果